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A 1D Quasilinear Equation Describing the Current Drive Excitation by Helicons in a Tokamak Plasma

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Abstract—

A quasilinear equation which allows describing evolution of the electron distribution function and generation of non-inductive currents by helicons is obtained. It is shown that in the analyzed case the Fokker–Planck equation can be approximated by a one-dimensional equation in the longitudinal electron velocity space with a diffusion coefficient proportional to the helicon power absorbed by electrons due to Landau damping.

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Funding

The total quasilinear equation for the distribution function in the case of helicon absorption was derived in the framework of the Ioffe Institute State Assignment 0040+2019-0023, the equation for a 1D electron distribution function was obtained under State Assignment 0034-2021-0002.

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Authors and Affiliations

  1. Ioffe Institute, St. Petersburg, Russia

    A. Yu. Popov & E. Z. Gusakov

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  1. A. Yu. Popov
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  2. E. Z. Gusakov
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Correspondence to A. Yu. Popov.

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Popov, A.Y., Gusakov, E.Z. A 1D Quasilinear Equation Describing the Current Drive Excitation by Helicons in a Tokamak Plasma. Tech. Phys. Lett. 49 (Suppl 2), S101–S103 (2023). https://doi.org/10.1134/S1063785023900480

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  • DOI: https://doi.org/10.1134/S1063785023900480

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